ICSHWI-7950: reimplement undeployment

Changes:

• merged the default and nonvolatile test cases to be able to fully test undeployment
• added support for iocs_to_undeploy_json extra var
• undeployment does the following tasks:
  • stops and disables the IOC systemd service
  • removes IOC console
  • umounts nonvolatile directory
  • deletes nonvolatile directory
  • deletes IOC directory
• modified ioc_deployment_result fact;
  • renamed iocs key to iocs_deployed
  • added iocs_undeployed

        "ioc_deployment_result": {
            "awx": {
                "awx_job_id": "foo"
            },
            "iocs_deployed": {
                "CCCE:test-nfs": {
                    "successful": true
                }
            },
            "iocs_undeployed": {
                "CCCE:will-be-undeployed": {
                    "successful": true
                }
            }
        }